TwoBass, now a couple of weeks has passed. You've must've rehearsed a couple of times, since you started this thread. Digging through most of the answers and suggestions around here, which all together makes sense, you've sure must've presented something towards the band or guitarist by now, don't you think?
Or is there someone who doesn't have the courage, guts, that are in the risk of being ostracized if this happens? The summary of all suggestions around here, is like, if all else fails, then move on with the rest of the band to a new guitarist. If he won't leave, then you have to. Since he's calling the shots, regarding rehearsing at his place, and - myabe - his band, van, whatever, you'll all have to leave and find another space, van, PA, and guitarist. There's really no other solution to this case. You can only be corteous, and show "respect" for an amount of time. When nothing is given back, i e mutual respect, it's time to move on.